SEP Analyze Data Which two columns have identical data? What do these two columns suggest about the identity of elements?

The two columns which have identical data are the Atomic number and the number of protons column. This indicates that the atomic number is equivalent to the number of protons in an element.

Explanation:

Atomic Number is given as the number of electrons in an element. As the number of electrons is required to be equal to the number of protons, for the element to exist in the neutral state. This indicates that the atomic number of an element can also be considered equal to the number of protons in that element.

50.23 i believe is correct but don't quote me on that.